It does not have to be in anyway a character person or an actual letter. Could be a head, fruit, shoe, who know. The point is the communication of the things, and them to be solving problem or fixing. One of them has a look of relief.
Hope that helps. You have a concept for sure. Just needs more work to be the final but I know you can do it. I was looking at your other work also. You have some impressive stuff! I will be ranking for next 3 hours there still is time :)